“There are little single things which men say and do, which give us a thorough insight into their character; and which enable us to construct a complete theory of what their nature is. And a thoughtful observer forms his estimate of those around him, often from remarking very little things: not so much by observing what men and women do when they are put on the alert, and think people are watching them, as observing their little sayings and doings when they are quite at their ease.”